* {
    padding: 0;
    margin: 0;
}

.subject-container {
    width: 100%;
    height: 650px;
    margin: 62px auto;
    display: flex;
}

.subject_left {
    width: 23%;
    height: 100%;
    position: fixed;
    top: 62px;
    background: #fff;
    /* box-shadow: 2px 2px 12px 2px #c1c1c1; */
    padding-bottom: 20px;
    overflow-y: scroll;
}

.subject_title {
    height: 50px;
    font-size: 20px;
    display: flex;
    color: #53C3C4;
    font-weight: bold;
    justify-content: center;
    align-items: center;
}

.subject_text {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
    overflow: hidden;
    margin: 12px;
    padding-left: 5%;
    font-size: 17px;
    font-weight: bold;
}

.subject_section {
    margin: 5px 5px 5px 0px;
    font-size: 15px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
    color: #2e2e2e;
    border: none;
    padding-left: 15%;
    background: none;
}

.section {
    height: 60px;
    font-size: 25px;
    font-weight: bold;
    justify-content: center;
    align-items: center;
    display: flex;
    border-bottom: 1px solid rgb(230 230 230);
}

.subject_right {
    width: 77%;
    /* box-shadow: -4px 0px 6px 2px #c1c1c1; */
    margin-left: 23%;
}

.display_none {
    display: none;
}

.subject_img {
    width: 98%;
    height: 300px;
    margin: 5px auto;
}

.subject_author {
    margin: 20px 5px 5px 5px;
    font-size: 16px;
}

.subject_code {
    margin: 8px 5px 20px 5px;
    padding-bottom: 10px;
    font-size: 16px;
}

.subject_next {
    width: 100%;
    height: 26px;
    display: flow-root;
}

.update_time {
    color: #c1c1c1;
    margin-top: 20px;
    float: right;
    margin-right: 20px;
}

.btn_next {
    float: right;
    margin-right: 20px;
}

.subject_part {
    margin: auto;
}

.active_message {
    color: #53C3C4;
    border-left: 4px solid #53C3C4;
}

.subject_section:hover {
    color: #53C3C4;
}